Analog is converted to digital signal by using if under - sampling technology . then a uniform hardware platform is consisted from tms320c54 family dsp , in which , diverse modulated signals are demodulated using pure software 在中频数字化以后使用ti的tms320c54系列dsp芯片等组成硬件平台,在这个统一的硬件平台上实现对不同类型调制信号的纯软件解调。
This harmonic analysis algorithm presented in this paper gets sampling datum using asimultaneous sampling technology , then alters these sampling datum by the interpolation algorithm in order to achieve the effect of simultaneous sampling 该种电网谐波分析方法是利用非同步等间隔采样技术得到采样数据,然后,将采样数据经插值变换,使其达到近似同步的采样效果。
The characteristic of its hardware is the high speed sampling technology adopted for recording transient fault information ; the characteristic of its software is the design of the platform used for transient signal analysis and the combined fault location algorithm 硬件方案的主要特点是设计了暂态量采集系统,软件方案的主要特点是设计了暂态信号的分析平台并实现了组合故障测距算法。
Using stratified two - stage sampling , collaborated with the nature of processed data and hierarchical cluster , the design can fairly satisfy the requirements of different levels regarding to the economic development of yunnan province and its sampling technology 摘要为适应云南省经济体制的发展,提高应用抽样调查技术的水平,在考虑云南省个体或私营企业有关调查数据特点的基础上,设计了具有针对性的自然分层与聚类分层相接合的分层二阶抽样方案。
The sampling technology is also being explored which including lowpass sampling , quadrature sampling and direct passband sampling and the setting of a / d , sampling rate , data acquisition and selecting filtering parameters . the implementation of each technique is also being discussed 分别对低通采样、正交带通采样和直接带通采样技术中有关a d在系统中的位置、采样率的确定、信息获取和滤波参数选取等问题进行系统论述,并讨论了各自的技术实现问题。
The software and hardware design of portable digital testing equipment based on tms320vc5510 are presented , which is the newly efficient and low power consuming dsp of ti corporation . the system realizes the requirement of sample theorem when sampling the wide spectrum signal with an equivalent sample technology , integrates the lcd control core in cpld and makes cpld as lcd controller instead of specific lcd controller , and makes the colorful stn - lcd as terminal displaying facility . the system suits the development requirement of the new portable digital testing equipment with the specialities of low power consuming , high integration and good displaying interface 本文介绍了以ti公司新一代高效率、低功耗数字信号处理器tms320vc5510为核心实现的便携式测试设备的软硬件设计,以等效采样技术实现采样宽频谱周期信号对采样定理的要求,在cpld内集成完整的lcd控制核代码,并以cpld作为lcd控制器取代专用控制器,以stn彩色lcd作为终端显示设备,该方案具有功耗低、集成度高、良好的人机接口等特点,适合新一代便携式测试设备的发展需求。
Embedded technologies , multi - way technologies and sampling technologies are used to reduce the sampling rate by software , so that the system can provide appropriate image format according to the condition of network and can eliminate aliasing noise . the system also uses motion detection to control the frame rate . therefore , the system can save transmission bandwidth effectively and design to provide multiple degrees qos according to the network condition 本方案采用了嵌入式技术和多路技术,并从采样技术入手,软件调整采样率,使得系统能够根据网络状态提供适当格式的图像,消除欠采样噪声,而且通过运动检测来控制帧率,从而可以有效地节省传输带宽,达到根据网络情况自适应地提供多种qos服务等级的目的。
Firstly introduced the basic theory and method with which the analog signal can be convert to digital form , including sampling theory and course , quantification and quantification error , coding , beside those we discussed some applications of sampling technology , the reason of frequency mixture and the method to eliminate it chapter 4 introduced analog mux - switch , for the reason of simpleness we only introduce it briefly 从第3章开始,对数据采集的基本理论进行讨论,首先介绍了模拟信号数字化处理中的基本理论、方法,包括采样过程、采样定理、量化与量化误差、编码,还讨论了几种采样技术的应用、频率混淆产生的原因及消除措施。第4章,介绍了模拟多路开关。
The core of floating threshold value system is the data sampling technology . we will introduce the key chip - tlc5540 and tlc5615 and utilize mcs51 to control the whole system in the article . it examines the original signal from the hgcdte sensor and realizes the control of floating threshold value 浮动阈值系统的核心是数据采集技术,文中介绍了核心芯片tlc5540和tlc5615 ,利用mcs51单片机控制整个系统,对hgcdte传感器输出的原始信号进行检测,实现了智能浮动阈值控制;同时阐述了性能先进的核心芯片? ? ad603及其应用于agc放大器的特殊性。
By using this method , we could make the extended testin and controling system to satisfy the real - time requriement of application . this article is based on the research of " the helicopter ' s aviating load - data harmonized loading and sampling technology " . we studied the question of real - time in the helicopter ' s aviating load - data sampling system , and finally realized the real - time extension of the system which based on windows2000 to improve the real - time performance of the system 本文结合中航二集团“十五”预研课题( 41801100101 ) ? “直升机飞行载荷数字化协调加载及数据采集技术研究” ,对数据采集系统中的实时性问题和实时扩展技术展开深入研究,最终实现了基于windows2000测控系统的实时扩展,并将其应用于实际的采集系统研制和开发中。